Off and on showers Wednesday, heavy rain arrives at night

Forecast

1-3" of rain a good bet through Thursday...

OVERNIGHT: Cloudy, Light Showers Or Drizzle. Lo 69. Winds: SE 5-10 mph.

WEDNESDAY: Scattered Showers, Mainly West Of Harrisburg, Rain Develops Overnight. Hi 78. Winds: SE 10-15 mph.

THURSDAY: Heavy Rain, Exits East By Evening. 1-3″ Expected. Hi 72.

Moisture continues to creep in from the south as a cold front slowly nudges east. We’ve seen some occasional light showers or drizzle today, and that will continue in spots tonight and early Wednesday morning. The morning commute should be just fine though. Some steadier showers are possible by mid-morning and afternoon but the steadiest rain should remain over western PA until after sunset. Highs tomorrow will top out in the upper 70s.

The main action for us comes Wednesday night and into Thursday. Heavy rain will set up shop west of Harrisburg early Thursday morning before overspreading the rest of the area by lunch-time. It may take until Thursday evening for the steadiest rain to clear our eastern counties, and by then 1-3″ of rain will have fallen for everybody, with locally higher amounts possible. Some flooding is possible in low-lying and typical poor drainage areas, especially given what’s been a wet month so far. A low-end severe threat is possible Thursday, but clouds should limit how unstable we get. By sunset Thursday night, clouds will clear and temperatures will quickly drop into the 50s!

Behind the front, cool air settles in for the end of the week. Highs look to be locked into the lower 70s with overnight lows in the lower 50s. A secondary front could push through during the weekend, possibly bringing some clouds late Saturday and a reinforcing shot of cool air and breezy conditions for Sunday. Overall, it looks like another terrific weekend — the first weekend of fall!

-Meteorologist Adis Juklo

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